Wordpress content structure is based on two aspects, pages and posts.
Understanding how to use posts and pages is important to structuring your blog/website in a way that is not only friendly to the user but SEO friendly as well.
Posts versus Pages
Posts are the dynamic pieces of content added to the “blog” section of Wordpress.
Pages are static pieces of information that are created outside of the “blogging” function in Wordpress.
Posts are normally not included in Wordpress navigation.
Pages tend to be automatically added to the navigation of the site. However both posts and pages can be added to your Wordpress Navigation.